Welded tuff consists of ash surrounding large, jagged, irregularly-shaped pieces of material.What is this material and where does it come from?
A)Mineral crystals that formed during cooling
B)Rock fragments that erupted from the volcano
C)Gas pockets from volatiles in the lava
D)Slivers of volcanic glass from the lava

Question

Quizplus · Accepted Answer

Welded tuff is formed from a volcanic eruption where hot ash and rock fragments are ejected into the air and then settle and compact into solidified layers. Therefore, the large, jagged, irregularly-shaped pieces of material in welded tuff come from rock fragments that erupted from the volcano.

Welded Tuff Consists of Ash Surrounding Large, Jagged, Irregularly-Shaped Pieces